but will it cost jodi arias hers? their relationship began innocently enough in of all places sin city. >> we were there for a convention. our company had had a big event there. i was there in las vegas with them. >> reporter: travis alexander was a motivational speaker, compelling and effective. he was also a close friend and co-worker of david hughes in the fall of 2006. >> and i knew that he was single and he was always looking for miss alexander. >> reporter: enter saleswoman and aspiring photographer jodi arias. >> and i told travis, hey, there's this cute girl that i work with, you should meet her. and he goes, introduce me. and so i introduced them and then they were able to develop a relationship pretty quickly from there. >> they met in vegas. the night they met it seemed that they -- things heated up very quickly because jodi arias has said within a week or so they're having sex in the car. >> reporter: jodi and travis had an instant physical connection, a whirlwind romance, but a long-distance one, with her